[APP][FREE]N-Matika - Math practice for kids, school

this is my first Android (and online) application. It's free. Can be used for Math practicing.
It does not contain many fancy features (pictures, sound), application is more oriented to improving skills.
When there is a time, I will add features/improvements (I'm doing this in my free time)

* history and settings is remembered between application restart
* default number of tests is now 10
* exam not added to the history when Back button is pressed
* better look and feel, colored buttons
* improved button alingment on mobile (Android) devices
* fixed date and time format in the history view
* upgraded to new Cordova 3.5.0 (Android version)
* minor fixes
* smaller size of APK